CN216063787U - Device capable of balancing weights of centrifugal tubes of multi-rotor centrifugal machine - Google Patents

Abstract

The utility model relates to the field of detection auxiliary equipment, in particular to a device capable of balancing weights of centrifuge tubes of a multi-rotor centrifuge. The feeding assembly can store fluid materials, the weight of each batch of stored materials is constant, and the feeding assembly can intermittently provide the materials for the counterweight assembly; the counterweight assembly can independently weigh a plurality of groups of disc bodies for bearing sample centrifuge tubes to be centrifuged simultaneously, and can intermittently receive counterweight materials provided by the feeding assembly through intermittent rotation and place the counterweight materials in the counterweight material tube, so that the weight of each disc body after being weighted is the same. Every sample centrifuging tube makes its total weight the same and reach the balance with the total weight of other groups through being equipped with the counter weight material pipe after the feed to need guarantee when the operation of many rotors centrifuge the limitation of every sample centrifuging tube equivalent and even number of wholesale, can realize automatic counter weight, the centrifuge of being convenient for is more effective and stable to be used.

Description

Device capable of balancing weights of centrifugal tubes of multi-rotor centrifugal machine

Technical Field

The utility model relates to the field of detection auxiliary equipment, in particular to a device capable of balancing weights of centrifugal tubes of a multi-rotor centrifugal machine.

Background

The centrifugal machine is an experimental detection device which separates, concentrates or purifies cells (particles) with different densities in a solution under the action of centrifugal force by utilizing the principle of centrifugal sedimentation. Desktop centrifuges for laboratories are mostly equipped with a plurality of uniformly distributed rotors, and each rotor is provided with two rotor test tube holes for placing centrifuge tubes. The centrifuge is because the motor drives a plurality of rotors high-speed rotatory, if the weight of a plurality of dress sample centrifuging tube's that remain centrifugal rotor is different, will produce unbalance, and the during operation very easily arouses vibrations and noise, and long-term use can arouse equipment wearing and tearing or damage. The equipment therefore requires that each batch of placed sample tubes must be of equal and even weight and must be symmetrically arranged. Can be when actual operation, can't guarantee every sample equivalent and the even number of wholesale, even equivalent and even the even number also can't guarantee to divide equally in a plurality of equipartition rotor test tube holes, consequently need carry out the counter weight to a plurality of sample centrifuging tubes. At present, most of the water-filling balance weights are manually and singly matched, and are tedious and cannot be accurately balanced, and even though the communicated water-filling balance weights of the soft bags are used in the prior art, the inflow amount cannot be determined to balance the water-filling balance weights due to the fact that dynamic weighing is not carried out. In view of the above, it is desirable to disclose a device for balancing the weight of centrifuge tubes of a multi-rotor centrifuge.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects in the prior art, the utility model discloses a device capable of balancing weights of centrifuge tubes of a multi-rotor centrifuge, which comprises a weight balancing component, a feeding component, a rotating disk seat, a support, a detection switch and an electric control system. The feeding assembly can store fluid materials, the weight of each batch of stored materials is constant, and the feeding assembly can intermittently provide the materials for the counterweight assembly; the counterweight assembly can independently weigh a plurality of groups of disc bodies for bearing sample centrifuge tubes to be centrifuged simultaneously, and can intermittently receive counterweight materials provided by the feeding assembly through intermittent rotation and place the counterweight materials in the counterweight material tube, so that the weight of each disc body after being weighted is the same. According to the utility model, through dynamic independent weighing and automatic independent feeding of the balance weight, each sample centrifuge tube is matched with the fed balance weight material tube, so that the total weight of each sample centrifuge tube is the same as that of other groups, and balance is achieved, thus the limitation that the equal amount and even number of samples of each sample centrifuge tube in a batch need to be ensured during operation of a multi-rotor centrifuge can be overcome, automatic balance weight can be realized, and the centrifuge can be used more effectively and stably.

In order to achieve the purpose, the technical scheme adopted by the utility model is as follows:

the utility model provides a can give device of many rotor centrifuge's centrifuging tube counter weight, includes but intermittent rotation's rotating disk seat, support, detection switch and electrical system, its characterized in that: still include counterweight assembly and feed subassembly, counterweight assembly can hold the disk body that holds the sample centrifuging tube that remains to be centrifuged to the multiunit simultaneously and independently weigh, and can accept the weight material that the counterweight material that feed subassembly provided makes each disk body behind the counter weight the same respectively, feed subassembly be equipped with the storage hopper that can save the fluid material, the weight of the material of every batch of storage hopper is invariable, feed subassembly can be to counterweight assembly intermittent type feed, feed subassembly arrange counterweight assembly's top in and support by the support, counterweight assembly support by rotating the disk seat and can order about it by rotating the disk seat and make intermittent type and rotate.

The counter weight subassembly include rotatory weighing rack and weight plate, rotatory weighing rack have the axis of rotation and be equipped with a plurality of groups U-shaped bracket and be equipped with a plurality of weighing sensor's rib form component on the bracket in the upper portion for the lower part, the weight plate be can place sample centrifuging tube and counter weight material pipe and both sides limit and be equipped with the component body of strip flat board, the weight plate be a plurality of and weight homogeneous phase the same, the strip flat board on a plurality of weight plate both sides limit is place respectively on the weighing sensor of a plurality of groups U-shaped bracket of rotatory weighing rack, two weighing sensor that every weight plate corresponds separately can be respectively for every weight plate weigh and feed back the information of gathering to electrical system.

The rotary weighing frame further comprises a frame body and a rotating shaft, the frame body is a snowflake-shaped component formed by splicing a plurality of groups of U-shaped brackets which are placed horizontally and have the same shape, the U-shaped brackets are uniformly distributed, square clamping grooves which are recessed downwards are formed in cantilevers of two parallel side wings of each U-shaped bracket, a weighing sensor is arranged at the bottom of each clamping groove, the center of each clamping groove is equal to the center interval of the frame body, the rotating shaft is a round rod piece with a key groove formed in the lower portion, the upper portion of the rotating shaft is fixedly connected to the center of the frame body, and the lower portion of the rotating shaft is connected with a rotary driving piece of a rotating disc seat.

The weight plate also comprises a bearing fin plate and a plate body, the plate body is a chamfer cuboid, the upper part of the chamfer cuboid is symmetrically provided with two round holes which are concave downwards and have the same size, the two holes are respectively a first tube placing groove for placing a sample centrifugal tube and a second tube placing groove for placing a weight material tube, the sample centrifugal tube and the weight material tube are both open bottle bodies which can be sealed by bottle caps, and the sample centrifugal tube and the weight material tube have the same size, the diameters of the first tube placing groove and the second tube placing groove are matched with the diameters of the sample centrifugal tube and the balance weight tube, the sample centrifugal tube and the balance weight tube can be placed in and taken out, the bearing fin plates are strip flat plates with smooth and planar bottom surfaces, the left side edge and the right side edge of each tray body are respectively and fixedly connected with one bearing fin plate vertically, the bearing fin plates are arranged in bilateral symmetry and are positioned in the middle of the left side edge and the right side edge of the tray body, and the central lines of the left bearing fin plate and the right bearing fin plate are perpendicular to the longitudinal central line of the tray body.

The feed subassembly include material loading pump, pipeline, storage hopper and electric valve, the storage hopper be the toper funnel that the big-end-up is the loudspeaker form, be equipped with electric valve and use the pipe connection under its lower part exit end, the material loading pump be the measurement delivery pump that can carry fluid material, the entry and the export of material loading pump all are equipped with the pipeline, its entry is connected with the raw materials pond, the suitable for reading of storage hopper can be inserted to its export, the material loading pump every batch carry equal ration, the weight homogeneous phase of every batch of storage hopper equals of storage hopper, electric valve can be according to the instruction intermittent type ground electronic opening and closing.

The centers of a plurality of counterweight pipes placed on a plurality of counterweight plates on the counterweight assembly are all on the same circumference taking the center of a rotating shaft of the rotary weighing frame as the center of a circle, the center of a discharge hole of a storage hopper of the feeding assembly is also on the circumference, and when the rotary weighing frame rotates in a clearance mode, the storage hopper can intermittently feed any counterweight pipe.

The detection switch is a photoelectric switch, the detection switch is arranged on the side edge right below the discharge port of the storage hopper of the feeding assembly and is locked on the support, and the detection switch can detect any one of the weight plates on the intermittent rotary weighing frame when rotating to the position right below the discharge port of the storage hopper and feed acquired information back to the electric control system.

The rotating disk seat comprises a speed reducing motor which can rotate intermittently and can brake.

The weighing sensor is a pressure weighing sensor with a plane upper surface.

The electric control system is an automatic control system, the electric control system is electrically connected with the weighing sensor of the counterweight component, the feeding pump and the electric valve of the feeding component, the motor of the rotating disc seat and the detection switch, the electric control system can receive and process information collected by the weighing sensor and the detection switch, and the electric control system can control the execution action of the feeding pump, the electric valve and the motor of the rotating disc seat.

As can be seen from the above description, the device for balancing the weights of the centrifuge tubes of the multi-rotor centrifuge provided by the utility model has the advantages that: the feeding component can store fluid materials, the weight of each batch of stored materials is constant, and the feeding component can intermittently provide the materials to the counterweight component; the balance weight assembly can independently weigh a plurality of groups of disc bodies which are used for bearing sample centrifuge tubes to be centrifuged, and feeds weighing information back to the control system to calculate the proportion of the weight difference between the sample centrifuge tubes, and then calculates the weight of the materials which are distributed to the sample centrifuge tubes and need to be balanced by the constant weight of each batch of materials in the storage hopper according to the proportion. The balance weight materials required by each sample centrifuge tube are distributed into the corresponding balance weight material tubes by utilizing the intermittent rotation of the balance weight assembly, the intermittent feeding of the feeding assembly and the dynamic weighing of each weighing sensor, so that the weights of the disc bodies after being balanced are the same, and the automatic balancing can be realized. According to the utility model, through dynamic independent weighing and automatic independent feeding of the balance weight, each sample centrifuge tube is matched with the fed balance weight material tube, so that the total weight of each sample centrifuge tube is the same as that of other groups, and balance is achieved, thus the limitation that the equal amount and even number of samples of each sample centrifuge tube in a batch need to be ensured during operation of a multi-rotor centrifuge can be overcome, automatic balance weight can be realized, and the centrifuge can be used more effectively and stably. The utility model has the advantages of reasonable design, simple structure, low cost and convenient popularization.

Drawings

FIG. 1 is a schematic view of an apparatus for balancing centrifuge tubes of a multi-rotor centrifuge according to the present invention.

Fig. 2 is an enlarged schematic view of the rotary weighing frame.

Fig. 3 is an enlarged schematic view of the weight plate.

Fig. 4 is an enlarged schematic view of the feed assembly.

Reference numerals:

1 a counterweight assembly; 11 rotating the weighing frame; 111 a frame body; 1111 a card slot; 112 a load cell; 113 a rotating shaft; 12 a weight plate; 121 load-bearing fin plates; 122 a tray body; 1221 a first pipe-placing groove; 1222 second discharge groove; 01, centrifuging the sample tube; 02 material balancing pipe; 2, a feeding component; 21 a feeding pump; 22 a pipeline; 23, a storage hopper; 24 electrically operated valves; 3, rotating the disc seat; 4, supporting the bracket; 5, a detection switch; 6 an electronic control system.

Detailed Description

The utility model is further described below by means of specific embodiments.

As shown in FIG. 1, the device for weighing centrifuge tubes of a multi-rotor centrifuge according to the present invention comprises a weight assembly 1, a feeding assembly 2, a rotating disk seat 3, a bracket 4, a detection switch 5 and an electronic control system 6. Counterweight assembly 1 can bear the disk body that the dress remains centrifugal sample centrifuging tube simultaneously and independently weigh, and can accept the weight material that counterweight material that feed assembly 2 provided makes each disk body behind the counter weight the same respectively, feed assembly 2 be equipped with the storage hopper that can save the fluid material, the weight of the material of every batch of storage hopper is invariable, the fluid material can be the running water also can be the powder particulate matter, the fluid material that this embodiment used is the running water, feed assembly 2 can be to 1 intermittent type feeds of counterweight assembly, feed assembly 2 arrange counterweight assembly 1's top in and by support 4 supports, counterweight assembly 1 support by rotating disk seat 3 and can order about it by rotating disk seat 3 and make intermittent type rotation.

As shown in fig. 1 to 3, the weight assembly 1 of the present invention includes a rotary weight frame 11 and a weight plate 12, wherein the rotary weight frame 11 is an umbrella-shaped member having a rotation shaft at a lower portion thereof and a plurality of U-shaped brackets at an upper portion thereof, and a plurality of weight sensors 112 are provided on the brackets, the number of the U-shaped brackets in the present embodiment is four, the number of the weight sensors 112 is eight, and the weight sensors 112 are pressure weight sensors having a flat upper surface. The weight plate 12 be can place sample centrifuging tube 01 and weight material pipe 02 and both sides limit and be equipped with the component body of strip dull and stereotyped, weight plate 12 be a plurality of and weight homogeneous phase the same, the strip dull and stereotyped on a plurality of weight plate 12 both sides limit is placed respectively on the weighing sensor 112 of a plurality of sets of U-shaped brackets of rotatory weighing rack 11, two weighing sensor 112 that every weight plate 12 corresponds separately can be respectively for every weight plate 12 weigh and with the information feedback of gathering to electrical system 6, the weight plate 12 of this embodiment is established to four. Rotatory weighing frame 11 still include support body 111 and pivot 113, support body 111 be the snowflake component that the equal same a plurality of groups of U-shaped bracket amalgamation of shape formed by the level was placed, a plurality of groups of U-shaped bracket equipartitions all are equipped with the square draw-in groove 1111 of downward recessed on the cantilever of two parallel flanks of every U-shaped bracket, the bottom of every draw-in groove 1111 all is equipped with a weighing sensor 112, the center of every draw-in groove 1111 all equals with support body 111's central interval, pivot 113 be the round bar piece that the lower part was equipped with the keyway, the perpendicular rigid coupling in upper portion of pivot 113 is in support body 111's center, the lower part of pivot 113 is connected with the rotary driving piece who rotates dish seat 3. The weight plate 12 further comprises a bearing fin plate 121 and a plate body 122, the plate body 122 is a chamfered cuboid with two circular holes which are recessed downwards and have the same size, the upper parts of the chamfered cuboid are symmetrically provided with two circular holes, the two circular holes are respectively a first tube placing groove 1221 for placing a sample centrifugal tube 01 and a second tube placing groove 1222 for placing a weight material tube 02, the sample centrifugal tube 01 and the weight material tube 02 are open bottle bodies which can be sealed by bottle caps, the sample centrifugal tube 01 and the weight material tube 02 have the same size, the diameters of the first tube placing groove 1221 and the second tube placing groove 1222 are matched with the diameters of the sample centrifugal tube 01 and the weight material tube 02, the sample centrifugal tube 01 and the weight material tube 02 can be placed in and taken out, the bearing fin plate 121 is a strip-shaped flat plate with a smooth plane bottom surface, the left side and the right side of each plate 122 are respectively and vertically fixedly connected with a bearing fin plate 121, the bearing fin plate 121 is arranged in bilateral symmetry and is positioned in the middle of the left side and the right side of the plate 122, the center line of the left and right load-bearing fins 121 is perpendicular to the longitudinal center line of the tray body 122.

As shown in fig. 4, the feeding assembly 2 of the present invention includes a feeding pump 21, a pipeline 22, a storage hopper 23 and an electric valve 24, wherein the storage hopper 23 is a conical funnel with a large top and a small bottom in a horn shape, the electric valve 24 is disposed right below an outlet end of the lower portion of the storage hopper and connected with the pipeline 22, the feeding pump 21 is a metering pump capable of delivering fluid materials, the feeding pump 21 used in this embodiment is a metering pump for delivering tap water, the inlet and the outlet of the feeding pump 21 are provided with the pipeline 22, the inlet is connected with a material tank, the outlet is connected to an upper port of the storage hopper 23, the feeding pump 21 delivers constant amount of water in each batch, the weight of each batch of the storage hopper 23 is equal, and the electric valve 24 can be intermittently opened and closed according to instructions.

As shown in fig. 1 to 4, centers of a plurality of weighting tubes 02 placed on a plurality of weighting disks 12 of the weighting assembly 1 are all on the same circumference with a center of a rotating shaft 113 of the rotating weighting bracket 11 as a circle center, a center of a discharge hole of a storage hopper 23 of the feeding assembly 2 is also on the circumference, and when the rotating weighting bracket 11 rotates intermittently, the storage hopper 23 can intermittently feed any weighting tube 02. The detection switch 5 is a photoelectric switch, the detection switch 5 is arranged on the side edge right below the discharge port of the storage hopper 23 of the feeding assembly 2 and is locked on the bracket 4, and the detection switch 5 can detect when any one of the counterweight plates 12 on the intermittently rotating rotary weighing frame 11 rotates to the position right below the discharge port of the storage hopper 23 and feed collected information back to the electric control system 6. The rotating disk seat 3 contains a speed reducing motor which can rotate intermittently and can brake. The electric control system 6 is an automatic control system, the electric control system 6 is electrically connected with the weighing sensor 112 of the counterweight component 1, the feeding pump 21 and the electric valve 24 of the feeding component 2, the motor of the rotating disc seat 3 and the detection switch 5, the electric control system 6 can receive and process information collected by the weighing sensor 112 and the detection switch 5, and the electric control system 6 can control the execution actions of the feeding pump 21, the electric valve 24 and the motor of the rotating disc seat 3.

The use method of the device capable of balancing the weight of the centrifuge tube of the multi-rotor centrifuge comprises the following steps:

this example is described with the four rotor laboratory bench centrifuge tubes being weighted and tap water being the counterweight.

Firstly, a constant total weight value of each batch of materials of the storage hopper 23 is set in the electronic control system 6, the total weight is not more than half of the total allowable weight of the four material weighing pipes 02, the electronic control system 6 instructs the feeding pump 21 to start, and the storage hopper 23 is fed according to the set constant total weight value.

And correspondingly placing four sample centrifuge tubes 01 to be centrifuged and four empty and open balance weight material tubes 02 into a first tube placing groove 1221 and a second tube placing groove 1222 respectively for weighing.

The electronic control system 6 calculates the ratio of the weight difference between the sample centrifuge tubes 01 according to the weighing information, and then calculates the weight of the materials which are distributed to the sample centrifuge tubes 01 by the constant total weight of the tap water in the storage hopper 23 according to the ratio.

The electronic control system 6 instructs the rotating disc seat 3 to drive the rotating weighing frame 11 to rotate, when the detection switch 5 detects that the first pipe placing groove 1221 of the first weight disc 12 is in butt joint with the outlet of the storage hopper 23, the electric valve 24 is instructed to be opened, tap water flows into the weight material pipe 02 in the first pipe placing groove 1221, at the moment, the two weighing sensors 112 corresponding to the first weight disc 12 dynamically weigh, until the actual weight reaches the weight required by calculation, the electric valve 24 is instructed to be closed, and the material supplement of the weight material pipe 02 of the first sample centrifuge tube 01 with required weight is completed. And continuously instructing the rotating disc seat 3 to rotate, and repeating the steps to complete the material supplementing of the material balancing pipe 02 which needs to be balanced by other sample centrifuge tubes 01.

And covering the bottle cap of the weighted material balancing pipe 02, and putting the bottle cap and the corresponding sample centrifuge pipe 01 into two rotor test pipe holes of the same rotor of the centrifuge together. All the material weighing tubes 02 and the corresponding sample centrifuge tubes 01 fill the rotor test tube holes of each rotor. If the number of the sample centrifuge tubes 01 in a certain batch is less than the number of the rotors of the centrifuge and the rotor test tube holes cannot be filled: if the number of the sample centrifuge tubes 01 is even and can be equally divided, the balance weight tubes 02 can be balanced by balance weights; otherwise, the balance weight material pipe 02 of the balance weight can replace the deficient sample centrifuge pipe 01, so that the rotor test pipe hole is fully occupied to reach balance.

According to the utility model, through dynamic independent weighing and automatic independent feeding of the balance weight, each sample centrifuge tube is matched with the fed balance weight material tube, so that the total weight of each sample centrifuge tube is the same as that of other groups, and balance is achieved, thus the limitation that the equal amount and even number of samples of each sample centrifuge tube in a batch need to be ensured during operation of a multi-rotor centrifuge can be overcome, automatic balance weight can be realized, and the centrifuge can be used more effectively and stably.

In the description of the present invention, terms such as "left", "right", etc., are used for indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of simplifying the description, and do not explicitly or implicitly indicate a specific orientation or positional relationship which is necessary, and thus should not be construed as limiting the protection content of the present invention.

In the description of the present invention, the terms "first," "second," etc. are used to define the names of the objects. The use of "first" and "second" is merely for convenience of simplifying the description, and no particular meaning is implied unless specifically stated to the contrary.

The above description is only an embodiment of the present invention, but the design concept of the present invention is not limited thereto, and any insubstantial modifications made by using the design concept should fall within the scope of infringing the present invention.

Claims (9)

1. The utility model provides a can give device of centrifuging tube counter weight of multi-rotor centrifuge, includes rotatable disk seat (3), support (4), detection switch (5) and electrical system (6) that can intermittent type is rotatory, its characterized in that: still include counter weight component (1) and feed component (2), counter weight component (1) can hold simultaneously the disk body that holds the dress and remain centrifugal sample centrifuging tube to the multiunit and carry out independent weighing, and can accept the counter weight material that feed component (2) provided respectively and make the weight of each disk body behind the counter weight the same, feed component (2) be equipped with the storage hopper that can store up the fluid material, the weight of the material of every batch of storage hopper is invariable, feed component (2) can be to counter weight component (1) intermittent type feed, feed component (2) arrange the top of counter weight component (1) in and support by support (4), counter weight component (1) support by rotating disk seat (3) and can order about it by rotating disk seat (3) and do the intermittent type and rotate.

2. The apparatus of claim 1, wherein the apparatus further comprises: counter weight subassembly (1) including rotatory weighing frame (11) and weight plate (12), rotatory weighing frame (11) have the axis of rotation for the lower part and be equipped with a plurality of groups U-shaped bracket and be equipped with the rib form component of a plurality of weighing sensor (112) on the bracket in upper portion, weight plate (12) for can place sample centrifuging tube (01) and counter weight material pipe (02) and both sides limit is equipped with the component body of strip dull and stereotyped, weight plate (12) be a plurality of and weight homogeneous phase the same, the strip dull and stereotyped of a plurality of weight plate (12) both sides limit is placed respectively on weighing sensor (112) of a plurality of groups U-shaped bracket of rotatory weighing frame (11), two weighing sensor (112) that every weight plate (12) correspond separately can be weighed and feed back the information of gathering to electrical control system (6) for every weight plate (12).

3. The apparatus of claim 2, wherein the apparatus further comprises: rotatory weighing frame (11) still include support body (111) and pivot (113), support body (111) be the snowflake component that the equal same a plurality of groups of U-shaped bracket amalgamation of shape formed by the level was placed, a plurality of groups of U-shaped bracket equipartitions, all be equipped with square draw-in groove (1111) of recess down on the cantilever of two parallel flanks of every U-shaped bracket, the bottom of every draw-in groove (1111) all is equipped with one weighing sensor (112), the center of every draw-in groove (1111) equals with the center interval homogeneous phase of support body (111), pivot (113) be the round bar piece that the lower part was equipped with the keyway, the perpendicular rigid coupling in upper portion of pivot (113) is in the center of support body (111), the lower part of pivot (113) is connected with the rotary driving spare that rotates dish seat (3).

4. The apparatus of claim 3, wherein the apparatus further comprises: the weight balance disc (12) further comprises a bearing fin plate (121) and a disc body (122), the disc body (122) is a chamfered cuboid with two downward-concave circular holes in the same size, the upper portion of the chamfered cuboid is symmetrically provided with a first tube placing groove (1221) for placing a sample centrifugal tube (01) and a second tube placing groove (1222) for placing a weight balance tube (02), the sample centrifugal tube (01) and the weight balance tube (02) are open bottle bodies sealed by bottle caps, the sample centrifugal tube (01) and the weight balance tube (02) are in the same size, the diameters of the first tube placing groove (1221) and the second tube placing groove (1222) are matched with the diameters of the sample centrifugal tube (01) and the weight balance tube (02), the sample centrifugal tube (01) and the weight balance tube (02) can be placed in and taken out, the fin plate (121) is a strip-shaped flat plate with a smooth and planar bottom surface, the left side edge and the right side edge of each disc body (122) are respectively and fixedly connected with the bearing plate (121), the bearing fin plates (121) are arranged in a left-right symmetrical mode and are positioned in the middle of the left side edge and the right side edge of the tray body (122), and the center lines of the left bearing fin plate and the right bearing fin plate (121) are perpendicular to the longitudinal center line of the tray body (122).

5. The apparatus of claim 4, wherein the apparatus further comprises: feed subassembly (2) including material loading pump (21), pipeline (22), storage hopper (23) and electric valve (24), storage hopper (23) be the toper funnel that big-end-up is the loudspeaker form, be equipped with electric valve (24) and connect with pipeline (22) under its lower part exit end, material loading pump (21) be the measurement delivery pump that can carry fluid material, the entry and the export of material loading pump (21) all are equipped with pipeline (22), its entry is connected with the raw materials pond, the last mouth that can insert storage hopper (23) of its export, material loading pump (21) every batch carry and all quantify, the weight of every batch of storage hopper (23) is all equal, electric valve (24) can be according to instruction intermittent type electric opening and closing.

6. The apparatus of claim 5, wherein the apparatus further comprises: the centers of a plurality of counterweight pipes (02) placed on a plurality of counterweight disks (12) on the counterweight assembly (1) are all on the same circumference taking the center of a rotating shaft (113) of the rotary weighing frame (11) as the center of a circle, the center of a discharge hole of a storage hopper (23) of the feeding assembly (2) is also on the circumference, and when the rotary weighing frame (11) rotates in a clearance mode, the storage hopper (23) can intermittently feed any one counterweight pipe (02).

7. The apparatus of claim 6, wherein the apparatus further comprises: the detection switch (5) is a photoelectric switch, the detection switch (5) is arranged on the side edge right below the discharge port of the storage hopper (23) of the feeding assembly (2) and is locked on the support (4), and the detection switch (5) can detect when any one of the counterweight discs (12) on the intermittent rotating rotary weighing frame (11) rotates to the position right below the discharge port of the storage hopper (23) and feed collected information back to the electric control system (6).

8. The apparatus of claim 7, wherein the apparatus further comprises: the rotating disk seat (3) comprises a speed reducing motor which can rotate intermittently and can brake.

9. The apparatus of claim 8, wherein the apparatus further comprises: electric control system (6) be automatic control system, electric control system (6) and weighing sensor (112) of counter weight subassembly (1), material loading pump (21) and electric valve (24) of feed subassembly (2), the motor of rotating disk seat (3), the equal electric connection of detection switch (5), electric control system (6) can receive the information of weighing sensor (112) and detection switch (5) collection and handle, electric control system (6) can control material loading pump (21), electric valve (24) and the executive action of the motor of rotating disk seat (3).

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